It'd be good if there were an option within custom games to be able to set conditions so that players have to select a particular staff or body gear type before being able to hit ready for that game, i.e.

All law staffs - The player has to select a law staff in order to be able to join the match.

At the moment people are trying to setup these kinds of matches using the game description which appears in the lobby, but there's often someone who makes a mistake and starts the game with the wrong kit.